从textarea中删除最后一个"\n"

Question

如何从textarea中删除最后一个 "\n"？

Answer 1

verses ="1\n222\n"
verses = verses.replace(/\n$/, "")
-> returns "1\n222"

Answer 2

来自http://en.wikipedia.org/wiki/Trim_%28programming%29

String.prototype.trim = function() {
  return this.replace(/^\s+|\s+$/g, "");
};

这将为字符串变量添加一个trim函数,从字符串的开头和结尾删除空格.

有了这个你可以做的事情:

var mystr = "this is my string   "; // including newlines
mystr = mystr.trim();

Answer 3

$ .trim()应该做的伎俩!

它从指定字符串的开头和结尾修剪空格和换行符.